Efficiency Evaluation of Fully Integrated On-board EV Battery Chargers with Nine-Phase Machines

Article English OPEN
Levi, E ; Bodo, N ; Subotic, I ; Espina, J ; Empringham, L ; Johnson, M

A fully integrated on-board battery charger for future electric vehicles (EVs) has been recently introduced. It re-utilizes all the propulsion components of an EV in charging/vehicle-to-grid (V2G) modes, it does not require any additional components or hardware reconfiguration, and charging/V2G modes are realized with zero electromagnetic torque production. Both fast (three-phase) and slow (single-phase) charging are possible, with unity power factor operation at the grid side. The solution is based on the use of a triple three-phase machine and a nine-phase inverter/rectifier. This paper reports on the results of efficiency evaluation for the said system. Testing is performed using both a nine-phase induction machine and a nine-phase permanent magnet (PM) machine for a range of operating conditions in charging/V2G modes, with both three-phase and single-phase grid connection. Additionally, the impact of converter interleaving on the losses and efficiency is also studied. Losses are separated for different subsystems, thus providing an insight into the importance of optimization of different EV power train components from the efficiency point of view. Promising efficiencies, in the order of 90%, are achieved although none of the system components have been optimized.
  • References (19)
    19 references, page 1 of 2

    [1] J. M. Slicker, “Pulse width modulation inverter with battery charger,” U.S. Patent 4 491 768, Jan. 1, 1985.

    [2] S. Haghbin, S. Lundmark, M. Alakula, and O. Carlson, “Grid-connected integrated battery chargers in vehicle applications: Review and new solution,” IEEE Trans. Ind. Electron., vol. 60, no. 2, pp. 459-473, Feb. 2013.

    [3] S. Kinoshita, “Electric system of electric vehicle,” U.S. Patent 5 629 603, May 13, 1997.

    [4] F. Lacressonniere and B. Cassoret, “Converter used as a battery charger and a motor speed controller in an industrial truck,” in Proc. Eur. Conf. Power Electron. Appl., Dresden, Germany, 2005, pp. 1-7.

    [5] S. Haghbin, S. Lundmark, M. Alakula, and O. Carlson, “An isolated highpower integrated charger in electrified-vehicle applications,” IEEE Trans. Veh. Technol., vol. 60, no. 9, pp. 4115-4126, Nov. 2011.

    [6] X. Lu, K. L. V. Iyer, K. Mukherjee, and N. C. Kar, “Investigation of integrated charging and discharging incorporating interior permanent magnet machine with damper bars for electric vehicles,” IEEE Trans. Energy Convers., vol. 31, no. 1, pp. 260-269, Mar. 2016.

    [7] L. De Sousa, B. Silvestre, and B. Bouchez, “A combined multiphase electric drive and fast battery charger for electric vehicles,” in Proc. IEEE Veh. Power Propulsion Conf., Lille, France, 2010, pp. 1-6.

    [8] I. Subotic, N. Bodo, and E. Levi, “An EV drive-train with integrated fast charging capability,” IEEE Trans. Power Electron., vol. 31, no. 2, pp. 1461-1471, Feb. 2016.

    [9] I. Subotic, N. Bodo, E. Levi, M. Jones, and V. Levi, “Isolated chargers for EVs incorporating six-phase machines,” IEEE Trans. Ind. Electron., vol. 63, no. 1, pp. 653-664, Jan. 2016.

    [10] I. Subotic, N. Bodo, E. Levi, and M. Jones, “Onboard integrated battery charger for EVs using an asymmetrical nine-phase machine,” IEEE Trans. Ind. Electron., vol. 62, no. 5, pp. 3285-3295, May 2015.

  • Similar Research Results (5)
  • Metrics
    No metrics available
Share - Bookmark